IC manufacturers Texas Instruments

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Texas Instruments UCC28881 | Demoboard TIDA-01097

<125-μA Standby, High-Efficiency Power Supply Reference Design for Neutral-less Wireless Lighting Controls

Overview

TopologyFlyback Converter
Input voltage93.5-126.5 V
Output 13.58 V / 0.01 A
IC revision001

Description

Lighting control devices such as wired or wirelessswitches and dimmers may be used in retrofitenvironments or in new installations. New installationsmay have separate line, neutral, and earth wireswhere the lighting control unit can be powered byconnecting it between the line and neutral, whereas inmost of the retrofit installations only line and earthwires may be available. In such cases, the lightingcontrol unit has to be powered by connecting itbetween line and earth terminals while ensuring thatthe current flowing to earth is limited to 0.5 mA. Thisnecessitates the use of a very low standbyconsumption, high efficiency power supply.This TI Design is a wireless lighting control unit usinga low quiescent current offline converter that enablesexcellent efficiency at low power levels, a low-noise,high-PSRR, low quiescent current, good line and loadtransient response LDO, and a very low standby andlow active current specs wireless microcontroller.

Features

<125-μA quiescent current including wireless MCU and 69% efficiency @ 35mW loadOff-line converter with integrated 700-V power MOSFETHigh side current limit circuit with inherent inrush current limiting, output overload and short circuit protectionsLow noise, high PSRR, low quiescent current, good load transient response LDO for wireless controlTested and characterized with SimpleLink Bluetooth® Low Energy Wireless MCU having 1-μA standby, low Rx, Tx, core and sensor controller currents enabling easy implementation of lighting controlsEnables neutral less lighting control applications with earth as return that complies with UL773A

Typical applications

  • Neutral-less or No Neutral Wireless Lighting, Control Switches, Dimmers, Photo Control Units
  • Motion Sensors, Occupancy and Vacancy Sensors

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesVINVOut1
(V)
IOut1
(mA)
fswitch
(kHz)
L
(mH)
NPRI : NSEC : NAUXISAT
(A)
VT
(V (AC))
L
(mm)
W
(mm)
MountSizeCTol. CVR
(V (DC))
Operating TemperatureDF
(%)
RISOCeramic TypeFl
(mm)
RDC max.
(Ω)
fres
(MHz)
VersionPins (Value)
(pcs)
RowsH
(mm)
GenderTypeIR
(A)
Packaging Samples
750343332SPEC
5 files Active i| Production is active. Expected lifetime: >10 years.MID-OLTI Offline Flyback Transformers for Texas Instruments 70 - 283 V (AC) 5 100 62 20.18 12.61:1 1500 10.16 8.26 THT EP7 -40 °C up to +125 °C 9.78 Tray
7447462471SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WE-TI Radial Leaded Wire Wound Inductor 0.47 0.4 6 6 THT 5075 -40 °C up to +125 °C 2.4 3.4 Heat Shrinking Tube 8.5 0.35
885012109007SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WCAP-CSGP MLCCs 10 V(DC) 3.2 2.5 121047 µF ±20% 10 -55 °C up to +85 °C 100.002 GΩ X5R Class II 0.75 2.5 7" Tape & Reel
61300411121SPEC
6 files Active i| Production is active. Expected lifetime: >10 years.WR-PHD 2.54 mm THT Pin Header 10.16 THT -40 °C up to +105 °C1000 MΩ 4 Single Pin Header Straight 3 Bag
Order Code Data­sheet Simu­lation
750343332SPEC
7447462471SPEC
885012109007SPEC
61300411121SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesVINVOut1
(V)
IOut1
(mA)
fswitch
(kHz)
L
(mH)
NPRI : NSEC : NAUXISAT
(A)
VT
(V (AC))
L
(mm)
W
(mm)
MountSizeCTol. CVR
(V (DC))
Operating TemperatureDF
(%)
RISOCeramic TypeFl
(mm)
RDC max.
(Ω)
fres
(MHz)
VersionPins (Value)
(pcs)
RowsH
(mm)
GenderTypeIR
(A)
Packaging Samples